Improvement in stuffing-boxes



K. OHIOKERING.

Stuffing-Box.

No. 217,989. r Patented'JuIy 29,1879

r'jiklfi 77'Z/zasses, 7 17210671227:

N-FEI'ERS, FHOTO-LITHDGRAPHER, WASHINGTON D C UNITED STATES PATENT OFFICE.

KENTON OHIOKERING, OF OIL CITY, PENNSYLVANIA.

IMPROVEMENT IN STUFFlNG-BOXES.

Specification forming part of Letters Patent No. 217,989, dated July 99, 1879; application filed October 25, 1878.

To all whom it may concern:

Be it known that I, KENToN OHIGKERING, of Oil City, in the county of Venan go and State of Pennsylvania, have invented certain new and useful Improvements in Stuffing-Boxes; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanyin g drawings, and to letters of reference marked thereon, which form a part of this specification, in which Figure 1 represents a vertical section of my improved stuffing-box. Fig. 2 is a perspective view of one of the bushings removed.

The object of my invention is to produce a cheap and durable stuffing-box, and so ar ranged that the wearing parts can be replaced at very slight cost. For renewing the working parts I employ bushings, located at the extremes of the box. Each box is provided with several sets of bushings, with the external diameters of the same dimensions; The internal diameters are of different sizes to accommodate the piston, polished rods, or plun gers adapted to work in saidbushings. Each stuffing-box is also provided with several followers having the bores of the same dimensions as the bushings.

A represents a stuffing-box with the exterior made in the ordinary manner, provided with a cap, B, and nipplep. Said nipple has a screw-thread on both ends, the longest end of which enters a sleeve, b, in the lower part of cap B. The interior of the nipple I is intended for packing, which surrounds the rod H, and is forced down and packed around said rod by means of the'follower D, forced down by cap B and nipple O. Said follower is provided with a flange, d, which forms a seat on end of nipple 0 when forced far enough into sleeve B.

The stuffing-box has screw-threads f f in B and O for the reception of screw-bushings E E, which are placed in position by a wrench or bar clutching ears e 0, though the cars can be dispensed with, and slots can be substituted and operate in the same manner.' Each set of bushings has the bores of the same diameter, and corresponding to the bore in follower D.

The internal diameters of bushings E E are made of various sizes in the difierent sets which accompany a stuffing-box, and adapted for various sizes of piston or polished rods.

The followers (represented by D) are also made of various sizes to correspond to the bushings, several being supplied with each box. The outside diameters, which have a screw-thread cut thereon, are all of the same dimensions in the various sets. By this means old bushings can be renewed and various sizes used in the same box, thus avoiding the unnecessary expense of buying a new box when Worn out.

With my improvement a box can be cheaply made of malleable iron. The bushings can be made of any suitable material. 1

In fitting my improved stuffing-box I place the packing around rod H, (represented in dotted lines,) and force the same down by means of the follower through the medium of cap B and nipple 0, operating the latter by means of nut c.

When it is necessary to use a different-sized polished rod, I remove the bushings E E and follower D and insert others to correspond to the size rod intended to be used.

The bushings can be of any desired length, and can also be placed in the follower, if necessary.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A stufling-box formed of a nipple and cap, each having screw-threaded internal openings larger than the-diameter of the polished rod, and each provided with a bushing at its outer end capable of being interchanged, removed, and replaced by others of diflerent internal diameter, substantially as and for the purpose described.

2. In combination with the nipple and cap of a stuffing-box, the interchangeable bushings E, screwed at each end of the device, and

the internal independent follower D, capable follower, I), contained in and abutting against of being advanced by the cap, substantially the interior of the cap to compress the packas and for the purpose set forth. ing, substantially as and for the purpose de- 3. The combination of the nipple proscribed.

vided with a bushing E, screwed thereto at KENTON GHIGKERING.

one end, the cap B, also provided with a simi- Witnesses:

larly-screwed bushing, the nipple screwed into JAMES C. BOYCE,

the sleeve b of the cap, and an independent W. R. EDELEN. 

